summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2010-08-12ASoC: Staticise WM8727 codec driver structureMark Brown
Nothing should be referencing this any more. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12x86, asm: Use a lower case name for the end macro in atomic64_386_32.SLuca Barbieri
Use a lowercase name for the end macro, which somehow fixes a binutils 2.16 problem. Signed-off-by: Luca Barbieri <luca@luca-barbieri.com> LKML-Reference: <tip-30246557a06bb20618bed906a06d1e1e0faa8bb4@git.kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-12ASoC: Update WM8962 to build with multi-componentMark Brown
No notable changes, currently build tested only. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2010-08-12Merge branch 'topic/multi-component' of ↵Mark Brown
git://git.kernel.org/pub/scm/linux/kernel/git/lrg/asoc-2.6 into for-2.6.37
2010-08-12ASoC: multi-component: TWL4030: Restore registers on removalPeter Ujfalusi
Add back the register restore call, when the codec driver is removed. This does not affect normal operation, but it is usefull when debugging audio through the twl4030 class codecs. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12ASoC: Automatically determine control_data for soc-cache usersMark Brown
Since the provision of a struct device for the CODEC is now mandatory we can use container_of() to locate the struct i2c_client and struct spi_device for relevant devices, removing the need to manually set it in each driver. A further patch will automate selection of the control type based on the bus_type of the struct device, further reducing the amount of driver code required. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12ASoC: Add MODULE_ALIAS to Samsung DAI driversMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12ASoC: Remove version display from WM8971 driverMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12ASoC: Remove unneeded control_data management from Wolfson driversMark Brown
Now soc-cache.c can figure out the I2C and SPI control data from the device for the CODEC we don't need to manually assign it in drivers. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12ASoC: Remove version display from WM8510 driverMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12asoc/multi-component: fsl: add support for disabled SSI nodesTimur Tabi
Add support for adding "status = disabled" to an SSI node to incidate that it is not wired on the board. This replaces the not-so-intuitive previous method of omitting a codec-handle property. Signed-off-by: Timur Tabi <timur@freescale.com> Acked-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12asoc/multi-component: fsl: fix exit and error paths in DMA and SSI driversTimur Tabi
The error handling code in the OF probe function of the SSI driver is not freeing all resources correctly. Since the machine driver no longer calls the DMA driver to provide information about the SSI, we don't need to keep a list of DMA objects any more. In addition, the fsl_soc_dma_remove() function is incorrectly removing *all* DMA objects when it should only remove one. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12asoc/multi-component: fsl: add support for 36-bit physical addressesTimur Tabi
Update the DMA driver used by the Freescale MPC8610 HPCD audio driver to support 36-bit physical addresses, for both DMA buffers and the SSI registers. The DMA driver calls snd_dma_alloc_pages() to allocate the DMA buffers for playback and capture. This function is just a front-end for dma_alloc_coherent(). Currently, dma_alloc_coherent() only allocates buffers in low memory (it ignores GFP_HIGHMEM), so we never actually get a DMA buffer with a real 36-bit physical address. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12powerpc: rename immap_86xx.h to fsl_guts.h, and add 85xx supportTimur Tabi
The immap_86xx.h header file only defines one data structure: the "global utilities" register set found on Freescale PowerPC SOCs. Rename this file to fsl_guts.h to reflect its true purpose, and extend it to cover the "GUTS" register set on 85xx chips. Signed-off-by: Timur Tabi <timur@freescale.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12ASoC: multi-component - Add Goni sound driverChanwoo Choi
This patch add sound support for the Goni board based on S5PV210. The Goni board is based on Samsung SoC(S5PV210) and include WM8994 codec over I2S to support sound. The kind of jack is below states : * SND_JACK_HEADPHONE * SND_JACK_HEADSET * SND_JACK_MECHANICAL : When TV-OUT cable is inserted on Goni board, the TV-OUT cable isn't connected to television. * SND_JACK_AVOUT : When TV-OUT cable is inserted on Goni board, the TV-OUT cable is connected to television. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12ASoC: multi-component - Add Aquila sound driverChanwoo Choi
This patch add sound support for the Aquila board based on S5PC110. The Aquila board is based on Samsung SoC(S5PC110) and include WM8994 codec over I2S to support sound. This uses the I2Sv4 driver compatible with I2Sv5 to run sound. The kind of jack is below states : * SND_JACK_HEADPHONE * SND_JACK_HEADSET * SND_JACK_MECHANICAL : When TV-OUT cable is inserted on Aquila board, the TV-OUT cable isn't connected to television. * SND_JACK_AVOUT : When TV-OUT cable is inserted on Aquila board, the TV-OUT cable is connected to television. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk> ASoC: multi-component: SAMSUNG: Fix wrong field name on Aquila board This patch modify the wrong field name on Aquila board. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12ASoC: multi-component - ASoC Multi-Component SupportLiam Girdwood
This patch extends the ASoC API to allow sound cards to have more than one CODEC and more than one platform DMA controller. This is achieved by dividing some current ASoC structures that contain both driver data and device data into structures that only either contain device data or driver data. i.e. struct snd_soc_codec ---> struct snd_soc_codec (device data) +-> struct snd_soc_codec_driver (driver data) struct snd_soc_platform ---> struct snd_soc_platform (device data) +-> struct snd_soc_platform_driver (driver data) struct snd_soc_dai ---> struct snd_soc_dai (device data) +-> struct snd_soc_dai_driver (driver data) struct snd_soc_device ---> deleted This now allows ASoC to be more tightly aligned with the Linux driver model and also means that every ASoC codec, platform and (platform) DAI is a kernel device. ASoC component private data is now stored as device private data. The ASoC sound card struct snd_soc_card has also been updated to store lists of it's components rather than a pointer to a codec and platform. The PCM runtime struct soc_pcm_runtime now has pointers to all its components. This patch adds DAPM support for ASoC multi-component and removes struct snd_soc_socdev from DAPM core. All DAPM calls are now made on a card, codec or runtime PCM level basis rather than using snd_soc_socdev. Other notable multi-component changes:- * Stream operations now de-reference less structures. * close_delayed work() now runs on a DAI basis rather than looping all DAIs in a card. * PM suspend()/resume() operations can now handle N CODECs and Platforms per sound card. * Added soc_bind_dai_link() to bind the component devices to the sound card. * Added soc_dai_link_probe() and soc_dai_link_remove() to probe and remove DAI link components. * sysfs entries can now be registered per component per card. * snd_soc_new_pcms() functionailty rolled into dai_link_probe(). * snd_soc_register_codec() now does all the codec list and mutex init. This patch changes the probe() and remove() of the CODEC drivers as follows:- o Make CODEC driver a platform driver o Moved all struct snd_soc_codec list, mutex, etc initialiasation to core. o Removed all static codec pointers (drivers now support > 1 codec dev) o snd_soc_register_pcms() now done by core. o snd_soc_register_dai() folded into snd_soc_register_codec(). CS4270 portions: Acked-by: Timur Tabi <timur@freescale.com> Some TLV320aic23 and Cirrus platform fixes. Signed-off-by: Ryan Mallon <ryan@bluewatersys.com> TI CODEC and OMAP fixes Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Samsung platform and misc fixes :- Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Jassi Brar <jassi.brar@samsung.com> Signed-off-by: Seungwhan Youn <sw.youn@samsung.com> MPC8610 and PPC fixes. Signed-off-by: Timur Tabi <timur@freescale.com> i.MX fixes and some core fixes. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> J4740 platform fixes:- Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> CC: Tony Lindgren <tony@atomide.com> CC: Nicolas Ferre <nicolas.ferre@atmel.com> CC: Kevin Hilman <khilman@deeprootsystems.com> CC: Sascha Hauer <s.hauer@pengutronix.de> CC: Atsushi Nemoto <anemo@mba.ocn.ne.jp> CC: Kuninori Morimoto <morimoto.kuninori@renesas.com> CC: Daniel Gloeckner <dg@emlix.com> CC: Manuel Lauss <mano@roarinelk.homelinux.net> CC: Mike Frysinger <vapier.adi@gmail.com> CC: Arnaud Patard <apatard@mandriva.com> CC: Wan ZongShun <mcuos.com@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12CRIS: Define io_remap_pfn_range as remap_pfn_rangeJesper Nilsson
CRIS don't need any special mapping for io, but didn't define this, meaning that all uses of io_remap_pfn_range lead to compile errors. This fixes a compile error introduced in CRIS when drivers/mtd/mtdchar.c mmap handling was changed in commit dd02b67d5e9e7896891fa27eb5db65f55a290998 Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2010-08-12mtd/m25p80: fix test for end of loopDan Carpenter
"plat_id" is always non-NULL here. There is a zero element on the end of the m25p_ids[] array and if we hit the end of the loop then plat_id points to that. This would lead to a NULL pointer dereference later on in the function. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Anton Vorontsov <cbouatmailru@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12mtd/m25p80: retlen is never NULLDan Carpenter
This is just a cleanup, it doesn't fix any bugs. These functions all check retlen inconsistently and it generates a warning in Smatch (http://smatch.sf.net). If retlen were ever NULL it would cause an oops and the code has been this way since 2006 so someone would have complained. Also I looked at other places that implemented the mtd read and write functions and they dereference retlen without checking. I removed the checks. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12MIPS: Fix gen_nand probe structures contentsMarek Vasut
This platform didn't properly fill nr_chips in gen_nand registration and therefore depended on gen_nand bug fixed by commit 81cbb0b17796d81cbd92defe113cf2a7c7a21fbb ("mtd: gen_nand: fix support for multiple chips") Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12gen_nand: Test if nr_chips field is validMarek Vasut
Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12BFIN: Fix gen_nand probe structures contentsMarek Vasut
These two platforms didn't properly fill nr_chips in gen_nand registration and therefore depended on gen_nand bug fixed by by commit 81cbb0b17796d81cbd92defe113cf2a7c7a21fbb ("mtd: gen_nand: fix support for multiple chips") Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12nand/denali: move all hardware initialization work to denali_hw_initChuanxiao Dong
All hardware initialization will be done in denali_hw_init before irq handler registered Change mtd name from "DENALI NAND" to be "denali-nand" since whitespace in name can cause problems if we use cmdlinepart Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12nand/denali: Add a page check in denali_read_page & denali_read_page_rawChuanxiao Dong
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12nand/denali: use cpu_relax() while waiting for hardware interruptChuanxiao Dong
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12nand/denali: change read_status function methodChuanxiao Dong
In mtd->write, Denali controller will use MODE_11 mode to read NAND flash status, then return back to MODE_1O mode to do page write. Here comes a bug for this kind of using, sometimes controller will not write data to NAND and just return a good interrupt to tell driver writing work is done. The data in this page is all 0xff and this page can not be written again. The reason is unknow. So read Denali controller register WRITE_PROTECT to get NAND status instead. Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12nand/denali: Fixed check patch warningsChuanxiao Dong
waring: no space for starting a line Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-12mfd: Fix incorrect kfree(i2c) in wm8994-core i2c_driver probeAxel Lin
The i2c_client received in probe() should not be kfree()'d. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Fix incorrect kfree(i2c) in wm831x-core i2c_driver probeAxel Lin
The i2c_client received in probe() should not be kfree()'d. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Fix incorrect kfree(i2c) in tps6507x i2c_driver probeAxel Lin
The i2c_client received in probe() should not be kfree()'d. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Add TPS6586x driverMike Rapoport
Add mfd core driver for TPS6586x PMICs family. The driver provides I/O access for the sub-device drivers and performs regstration of the sub-devices based on the platform requirements. In addition it implements GPIOlib interface for the chip GPIOs. TODO: - add interrupt support - add platform data for PWM, backlight leds and charger Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Use macros instead of some constant magic numbers for menelausJarkko Nikula
This patch is originally done by Carlos Eduardo Aguiar. Original fix is commit 3305829b2816072b9c8ed01374b205ae4de74027 in git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git Author modified the fix for mainline version of menelaus. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Cc: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Fix menelaus mmc slot 2 misconfigurationJarkko Nikula
We are modifying register value instead of return value. This fix is originally done by Carlos Eduardo Aguiar. Original fix is commit bb4e91722e29efe31587d2cc664b6def645aecd9 in git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git Author modified the fix for mainline version of menelaus. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Cc: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Missing slab.h includesDavid Miller
Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Fix wrong wm8350-core kfree in error pathAxel Lin
This patch includes below fixes: 1. fix wm8350_create_cache error path make sure wm8350->reg_cache is freed in error path. 2. fix wm8350_device_init error path no need to kfree(wm8350->reg_cache) in the case of goto out. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Fix wm8994_device_init() return valueAxel Lin
wm8994_device_init() will return 0 in the case of kzalloc fail in current implementation. This patch fixes the return value. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Avoid calling platform_device_put() twice in ucb1400 probe error pathAxel Lin
In the case of goto err2, what we want is to call platform_device_del() instead of platform_device_unregister(). Otherwise, we call platform_device_put() twice. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Annotate tc6387xb probe/remove routines with __devinit/__devexitAxel Lin
Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Fix tc6387xb resource reclaimAxel Lin
This patch includes below fixes: 1. add a missing iounmap in tc6387xb_probe() error path 2. fix resource reclaim in tc6387xb_remove() Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Fix wrong goto labels for tc6393xb error handlingAxel Lin
This patch corrects the error handling path. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Get rid of now unused mc13783 private headerUwe Kleine-König
This adds all remaining definitions that are used by the core driver to the .c file. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12hwmon: Don't access struct mc13783 directly from mc13783-adcUwe Kleine-König
There is a shiny new mc13783 API function that can be used instead. While at it refactor the code a bit to reduce code duplication a bit. This removes the last user of <linux/mfd/mc13783-private.h> and so this include file can go away. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: New mc13783 function exposing flagsUwe Kleine-König
This is needed for the mc13783-adc driver to decide if a touch screen is connected. If so some channels are not available as generic hwmon inputs. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Check jz4740-adc kmalloc() resultAxel Lin
If kmalloc() fails exit with -ENOMEM. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Fix jz4740-adc resource reclaim in probe error pathAxel Lin
If mfd_add_devices() fail, we need to relese allocated resources. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Add WM8321 supportMark Brown
The WM8321 is a PMIC for low power, high performance applications. From a software point of view the device is identical to the WM8320, all the differences between the two devices are visible only in hardware. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Add stmpe auto sleep featureSundar R Iyer
Some STMPE devices support entering sleep mode automatically on a specified timeout of inactivity on the I2C bus with the host system. Acked-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Sundar R Iyer <sundar.iyer@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12touchscreen: Fix sign bugKulikov Vasiliy
platform_get_irq_byname() can return negative results, it is not seen to unsigned ts_irq. Make it signed. Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Acked-By: Luotao Fu <l.fu@pengutronix.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-08-12mfd: Add support for TWL6030 PWMHemanth V
TWL6030 supports PWM (Pulse Width Modulator) which is used to control charging LED. PWM allows for controlling brightness. This patch implements the APIs required by leds-pwm driver. Signed-off-by: Hemanth V <hemanthv@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>